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Eur Respir J 2003; 21:866-871
Copyright ©ERS Journals Ltd 2003


Effects of tobacco smoking on findings in chest computed tomography among asbestos-exposed workers

T. Vehmas1, L. Kivisaari2, M.S. Huuskonen1 and M.S. Jaakkola1

1 Finnish Institute of Occupational Health and 2 Dept of Radiology, Helsinki University Central Hospital, Helsinki, Finland

CORRESPONDENCE: M.S. Jaakkola, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A FIN-00250 Helsinki, Finland. Fax: 358 947472423. E-mail: maritta.jaakkola@occuphealth.fi

Keywords: emphysema, fibrosis, lung, radiograph computed, smoking, tomography

Received: April 9, 2002
Accepted December 26, 2002

This study examined the effects of smoking on the findings in chest computed tomography (CT) in 587 asbestos-exposed construction workers (11 females, 576 males, mean age 62 yrs; 18 never-smokers, 406 exsmokers and 163 current smokers). The workers were imaged with spiral CT and high-resolution CT. A total of 13 radiological signs were scored by three radiologists independently. The workers' medical data, smoking habits and occupational exposures were collected at an interview. The effects of smoking status and smoked pack-yrs (0–87.5) on the CT signs were studied using multivariate analysis adjusted for confounding factors.

Smoking increased all emphysema signs and contributed to bronchial wall thickening. Smoking was negatively associated with curvilinear and septal lines as well as with parenchymal bands. In persons who had smoked <10 pack-yrs, smoking was positively related to paraseptal emphysema and to bronchial wall thickening and negatively related to septal lines, subpleural nodules and honeycombing.

Smoking was related to several abnormal computed tomography signs even among those with relatively small exposure. Computed tomography can detect changes due to smoking at an early stage.




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